No risk of slipping. The SUPER 1600-1 operated on the pretty steep slope of 1:4 without any safety cable required. Covering Layer Paved to Stabilize the Dunes.   The Scene: Isle of Borkum, Shoreline Sections 28 to 35     Borkum is the westernmost isle in the chain of seven East Frisian Islands lying in the North Sea, off the German coast. Covering an area of some 36km2, it also is the largest of these islands and forms part of the "Lower Saxony Wadden Sea National Park". Borkum, just as the neighbouring islands, is in constant danger of erosion on its western shore by the strong tidal currents of the North Sea. In order to slow down or even stop this process and to keep their shoreline in place, the islanders took protective measures. Quite recently, a SUPER 1600-1 resurfaced an existing dune protecting asphalt layer which is to prevent the sand on the south-western shore of the island from being washed away.           Asphalt paving on shores has always been a nerve-wrecking business. It is above all logistics for mix supply and the change of tides, permitting a window of only a few hours to carry out paving, that pose a real challenge. For the job on the Isle of Borkum, a further difficulty was the dunes sloping rather steeply in a ratio of 1:4. German contractor Arbeitsgemeinschaft Koch/Huneke from Westerstede and Leer took up the challenge and resurfaced the dune protecting asphalt layer on the Isle of Borkum on shoreline sections 28-35. Waves from a roaring North Sea hitting the island for more than 30 years had made resurfacing necessary.   Mix carried over the sea     The asphalt mix was carried over the sea on board a coastal vessel and after arrival in the harbour loaded on 12-ton lorries to be hauled to the job site. Preparations that needed to be made for paving were laborious as the paving team was required to continually remove sand, washed ashore, from the area to be paved. Only a few hours a day were actually available for paving work.   Ample traction for a slope of 1:4     Nevertheless, progression of work was pretty fast and the paving team managed to get the job done within the four weeks scheduled for completion. This was due not least to the choice of machinery. "The SUPER 1600-1 is ideal for this kind of task" Bodo Eberhard from contractor Koch/Huneke says. Although knowing the imponderabilities, the paving team did not come up against any problems. The incline of the dunes had no adverse effect upon the performance of the paver which operated in a width of 7m at right angles to the slope. Nor were the fears justified that there might be a risk of the paver slipping due to the high transverse forces. The paver's design and excellent tractive properties allowed the machine to even operate on the slope without any safety cable required.               Job Site Details   Project: Resurfacing a dune protecting layer on the Isle of Borkum (south-western shoreline on sections 28 - 35) Distance paved: 1.6km Slope: 1:4 Award of Contract by: Waterway and Shipping Authorities, Emden Contractor: Arbeitsgemeinschaft Koch/Huneke from Westerstede and Leer Equipment: VÖGELE SUPER 1600-1 with AB 500 Extending Screed in TV Version Paving Details: Pave Widths   First strip paved across full width of 7m, following strips paved 4m to 5m wide Layer Thickness   Lower area of dunes: 10cm combined base and wearing course (0/16)   Higher area of dunes: 4cm combined base and wearing course (0/11) Quantity of Mix Paved 5,500 t        VÖGELE NIVELTRONIC® Grade and Slope Control achieved excellent results.            Withstands the hungry sea: design of the dune protecting layer.         Joint-free paving to withstand the sea     The raging forces of the North Sea which the Isle of Borkum is exposed to called for specific requirements. For the first strip 7m wide, joint-free paving was a must in order to withstand the hungry sea. Another 4 strips followed, 4 to 5m wide, which were paved impeccably one after the other by the SUPER 1600-1. NIVELTRONIC® Grade and Slope Control installed on the paver was combined with a short ski. The mix laid on this job featured a higher binder content than usual to ensure perfect and positive sealing of the asphalt surface after compaction by rolling. The specified final density of 97 -100% could be achieved without any kind of problem. Finally, the asphalt surface was sprayed with bitumen emulsion containing a synthetic additive in order to bring about maximum protection against the salt water and the high tidal forces.